ffmpeg学习笔记5 编译ffmpeg(Win10+android-ndk-r22)

前言

笔者尝试在win10下，编译android版本的ffmpeg，前面做了不少准备，终于可以编译了

一、安装MSYS2

下载地址：MSYS2

安装完成后执行如下命令

pacman -S --needed base-devel mingw-w64-x86_64-toolchain

 安装所需要的工具链

二、下载android NDK

下载地址：不受支持的 NDK 下载  |  Android NDK  |  Android Developers

笔者没有单独下载，因为在配置Qt for android时，已经自动下载完成了

三、下载ffmpeg源码

下载地址：Download FFmpeg

下载完成后，解压到一个没有中文、空格的目录中

四、编译源码

1.编写编译脚本，如下所示

#!/bin/bash
#NDK目录
NDK=E:/software/android/commandlinetools-win-6609375_latest/ndk/22.1.7171670

HOST_TAG=windows-x86_64
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/$HOST_TAG
API=24
BASEPATH=$(cd `dirname $0`; pwd)

function build_android
{
echo "Compiling FFmpeg for $CPU"
./configure \
    --prefix=$PREFIX \
    --disable-neon \
    --disable-hwaccels \
    --disable-postproc \
    --enable-shared \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-avdevice \
    --disable-doc \
    --disable-symver \
    --extra-cflags="-I$X264_INCLUDE  -I$FDK_INCLUDE -I$MP3_INCLUDE -I$SYSROOT/usr/include -Os -fpic $OPTIMIZE_CFLAGS" \
    --extra-ldflags="-L$FDK_LIB -L$X264_LIB -L$MP3_LIB -L$SYSROOT/usr/lib" \
    --enable-nonfree \
    --enable-gpl \
    --enable-libfdk-aac \
    --enable-libx264 \
    --enable-libmp3lame \
	--enable-cross-compile \
    --cross-prefix=$CROSS_PREFIX \
    --target-os=android \
    --arch=$ARCH \
    --cpu=$CPU \
    --cc=$CC \
    --cxx=$CXX \
    --sysroot=$SYSROOT \
    $ADDITIONAL_CONFIGURE_FLAG
make clean
make
make install
echo "The Compilation of FFmpeg for $CPU is completed"
}

#armv8-a
ARCH=arm64
CPU=armv8-a
CC=$TOOLCHAIN/bin/aarch64-linux-android$API-clang
CXX=$TOOLCHAIN/bin/aarch64-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/$HOST_TAG/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/aarch64-linux-android-
PREFIX=$(pwd)/install/$CPU
OPTIMIZE_CFLAGS="-march=$CPU"
#AR=$TOOLCHAIN/bin/aarch64-linux-android-ar
#AS=$TOOLCHAIN/bin/aarch64-linux-android-as
#LD=$TOOLCHAIN/bin/aarch64-linux-android-ld
#RANLIB=$TOOLCHAIN/bin/aarch64-linux-android-ranlib
#STRIP=$TOOLCHAIN/bin/aarch64-linux-android-strip
#第三方库

FDK_INCLUDE=E:/software/ffmpeg/fdk-aac_android_arm64-v8a/build_arm64-v8a/install/include
FDK_LIB=E:/software/ffmpeg/fdk-aac_android_arm64-v8a/build_arm64-v8a/install/lib
X264_INCLUDE=E:/software/ffmpeg/x264_android_arm64-v8a/install/armv8-a/include
X264_LIB=E:/software/ffmpeg/x264_android_arm64-v8a/install/armv8-a/lib
MP3_INCLUDE=E:/software/ffmpeg/lame-3.100_android_arm64-v8a/install_arm64-v8a/armv8-a/include
MP3_LIB=E:/software/ffmpeg/lame-3.100_android_arm64-v8a/install_arm64-v8a/armv8-a/lib
#X265_INCLUDE=E:/software/ffmpeg/x265_git/build/android_aarch64/install/include
#X265_LIB=E:/software/ffmpeg/x265_git/build/android_aarch64/install/lib
export PKG_CONFIG_PATH=E:/software/ffmpeg/x265_git/build/android_aarch64/install/lib/pkgconfig:$PKG_CONFIG_PATH
#export PKG_CONFIG_PATH=/E/software/ffmpeg/x265_git/build/android_aarch64/install/lib/pkgconfig:/E/software/ffmpeg/x264_android_arm64-v8a/install/armv8-a/lib/pkgconfig:$PKG_CONFIG_PATH

build_android


#armv7-a
ARCH=arm
CPU=armv7-a
CC=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang
CXX=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/$HOST_TAG/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/arm-linux-androideabi-
PREFIX=$(pwd)/install/$CPU
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
#build_android

#x86
ARCH=x86
CPU=x86
CC=$TOOLCHAIN/bin/i686-linux-android$API-clang
CXX=$TOOLCHAIN/bin/i686-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/$HOST_TAG/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/i686-linux-android-
PREFIX=$(pwd)/install/$CPU
OPTIMIZE_CFLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32"
#build_android

#x86_64
ARCH=x86_64
CPU=x86-64
CC=$TOOLCHAIN/bin/x86_64-linux-android$API-clang
CXX=$TOOLCHAIN/bin/x86_64-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/$HOST_TAG/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/x86_64-linux-android-
PREFIX=$(pwd)/install/$CPU
OPTIMIZE_CFLAGS="-march=$CPU -msse4.2 -mpopcnt -m64 -mtune=intel"
#build_android

 读者需要自己替换对应目录

笔者使用的api是24

将完成的脚本保存为build.sh，放到源码目录

2.编译

打开mingw64，跳转到源码目录中，运行脚本

sh build.sh

笔者大约等待了近一个小时， 得到编译后的结果

已编译完成的动、静态库

后记

1.笔者只编译了arm64-v8a的版本，其他版本笔者没有尝试，感兴趣的小伙伴可以自己尝试下

2.笔者原来想把x265也编译上，但添加后，提示error "unsatisfied condition: X264_MPEG2"

查看ffbuild目录，提示ERROR: x265 not found using pkg-config

笔者尝试安装pkg-config，发现与当前的环境冲突，故没有添加x265